The American Iron and Steel Institute is a trade association of North American steel producers. The group’s mission includes advocating for public policy, education and innovation for the Iron and Steel Industry. The Institute was established under the leadership of Elbert H. Gary (1846-1927) in 1908, after the Panic of 1907 brought an end to industry-wide consolidations. This small collection consists of a group of stereographs by the H.C. White Company of North Bennington, Vermont showing views (including interiors and workers) of the Homestead Steel Works near Pittsburgh, Pennsylvania taken around 1907.

At the turn of the century, under the direction of Charles M. Schwab (1862-1939) and Eugene Grace (1876-1960), Bethlehem Steel Corporation became the second largest American steel company; combined with its other venture, Bethlehem Shipbuilding Corp., it became a leading twentieth century American business. The collection includes a wide range of photography which documents the company’s long history and the breadth of its enterprises from east to west coasts and overseas. It contains eighteenth, nineteenth, and twentieth century industrial and non-industrial images and of management and workers. As a research tool, its use will be as varied and extensive as the corporation itself was during its years as an American industrial giant.

John Oscar Skiles (1895-1960) was a longtime employee of Bethlehem Steel Corporation, where he worked as an analyst in the Metallurgical Department of the company's Sparrows Point, Maryland, plant, beginning in the 1920s until his retirement in 1960. This small collection consists of one folder of materials related to Skiles' employment at Bethlehem Steel.

Lukens Steel Company was a medium-sized producer of specialty steel products and one of the top three U.S. producers of steel plate. The Lukens Steel Company records documents all aspects of the business from the early nineteenth century through the 1970s.

Michael Tenenbaum (1913-2005) was a metallurgist and President of the Inland Steel Company from 1971 to 1978. This small collection of his papers consist of a series of his writings and speeches and a small number of Inland Steel Company publications.

The Phoenix Steel Company began in the late 18th century as a manufacturer of cut nails. It later became a major producer of railroad rails and iron and steel structural members. Claymont Division of the Phoenix Steel Corporation was established in 1960 when the company purchased the Claymont, Delaware steel plant from the Colorado Fuel and Iron Company. This small collection of materials originating from the Claymont steel plant includes miscellaneous plant announcements, catalogs, labor agreements, photographs, company-issued newsletters, and brief historical essays on the Phoenix Steel Corporation and its predecessors.

The Pittsburgh Steel Company manufactured steel products. Early products included wire, barbed wire, nails, wire fence, and pipe. This item is an album containing photographs of birds-eye-views of the Monessen plant, an exterior of the office building, views in boiler houses, open hearth furnaces, soaking pits, power plants, engines, and an electric power plant.